Vintage Aynsley Yellow & Gold Corset Bone China Cup and Saucer England

This cup and saucer belonged to my mother.  I believe it simply sat in her China cabinet all its life until I unearthed it in a box as we prepare to move to warmer and less taxed climes. I honestly would keep this it is so beautiful, but I have no room. So I would like it to go to a good home.   In nice vintage condition. I do not see and chips or cracks, but I do see a mark on the back of the plate and some marks on the front. There is also a small mark on the gold trim. Cup looks good, but through a magnifying glass I can see some small marks on the gold trim near the base.  PLEASE  LOOK AT ALL THE PHOTOS. I AM NOT AN EXPERT SO MAKE YOUR OWN DETERMINATION AS TO CONDITION. IF YOU NEED MORE PHOTOS ASK.  Edges of cup and saucer are gold. Cup is yellow and corset shaped. Gold scrolls leaf shape and edging.  Back has a stamp and says Bone China. England and a crown est.1775. Orange lettering appears to be B5267 (cup) B8567 (saucer). These are hard to read. It is my best guess.  Please look at all the photos and ask any questions before you buy. I try to describe everything the best I can.  Thanks for stopping by and taking a look.